/Engine/Source/Editor/MeshPaint/Public/MeshPaintHelpers.h
Applies vertex painting to InOutvertexColor according to the given parameters
static bool PaintVertex ( const FVector & InVertexPosition, const [FMeshPaintParameters](API\Editor\MeshPaint\FMeshPaintParameters) & InParams, [FColor](API\Runtime\Core\Math\FColor) & InOutVertexColor )